<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品列表</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区域 -->
    <el-card class="box-card">
      <!-- 搜索与添加区域 -->
      <el-row :gutter="20">
        <el-col :span="10">
          <el-input clearable placeholder="请输入内容" v-model="queryInfo.query" @clear="getGoodsList">
            <el-button slot="append" icon="el-icon-search" @click="getGoodsList"></el-button>
          </el-input>
        </el-col>
        <el-col :span="4">
          <el-button type="primary" @click="goAddpage">添加商品</el-button>
        </el-col>
      </el-row>
      <!-- table 表格区域 -->
      <el-table :data="goodslist" border stripe>
        <el-table-column type="index" label="序号">
        </el-table-column>
        <el-table-column label="商品名称" prop="goods_name"></el-table-column>
        <el-table-column label="商品价格" prop="goods_price" width="95px"></el-table-column>
        <el-table-column label="商品重量" prop="goods_weight" width="70px"></el-table-column>
        <el-table-column label="创建时间" prop="add_time" width="140px">
          <template slot-scope="scope">
            {{scope.row.add_time | dateFormat}}
          </template>
        </el-table-column>
        <el-table-column label="操作" width="130px">
          <template slot-scope="scope">
            <el-button type="primary" icon="el-icon-edit" size="mini"></el-button>
            <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.goods_id)"></el-button>
          </template>
        </el-table-column>
      </el-table>

      <!-- 分页区域 -->
      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="queryInfo.pagenum"
        :page-sizes="[5, 10, 15, 20]"
        :page-size="queryInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
        background>
      </el-pagination>
    </el-card>
  </div>
</template>

<script>
export default {
  data() {
    return {
      // 查询参数对象
      queryInfo: {
        query: '',
        // 当前页
        pagenum: 1,
        // 一页多少数据
        pagesize: 10
      },
      // 商品列表
      goodslist: [],
      // 总数据条数
      total: 0
    }
  },
  created() {
    this.getGoodsList();
  },
  methods: {
    // 根据分页获取对应的商品列表
    async getGoodsList() {
      const { data: res } = await this.$http.get('goods', {
        params: this.queryInfo
      });
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品列表失败！');
      } else {
        this.$message.success('获取商品列表成功');
        // console.log(res.data);
        this.goodslist = res.data.goods;
        this.total = res.data.total;
      }
    },
    // 当前页数据发生变化后
    handleSizeChange(newSize) {
      // 将变化后的页码数据重新赋值给 pagesize
      this.queryInfo.pagesize = newSize;
      // 重新加载数据
      this.getGoodsList();
    },
    // 当前页码发生变化触发的事件
    handleCurrentChange(newPage) {
      // 将变化后的页码重新赋值给 pagenum
      this.queryInfo.pagenum = newPage;
      // 重新加载数据
      this.getGoodsList();
    },
    // 点击删除按钮，删除指定商品
    async removeById(id) {
      const confirmResult = await this.$confirm('此操作将永久删除该商品, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除！');
      } else {
        const { data: res } = await this.$http.delete('goods/' + id);
        if (res.meta.status !== 200) {
          return this.$message.error('删除商品失败！');
        } else {
          this.$message.success('删除商品成功！');
          // 重新加载数据
          this.getGoodsList();
        }
      }
    },
    // 点击添加商品
    goAddpage() {
      // 跳转到指定的路由页面
      this.$router.push('/goods/add');
    }
  }
}
</script>

<style lang="less" scoped>

</style>
